Chemistry PYQ 115 of 152 · Everyday Chemistry

Which of the following is also known as laughing gas?

  1. ANitric oxide
  2. BNitrous oxide
  3. CNitrogen pentoxide
  4. DNitrogen
  5. ENone of the above/ More than one of the above

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Correct answer: (b) Nitrous oxide

Explanation

Nitrous oxide (N2O) is known as laughing gas, used as an anaesthetic.

It is prepared by thermal decomposition of ammonium nitrate.

Nitric oxide (NO) and nitrogen pentoxide (N2O5) are different oxides without this property.

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